CN202121594U - Quantum security communication system based on synchronous random number information base information retrieval - Google Patents
Quantum security communication system based on synchronous random number information base information retrieval Download PDFInfo
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Abstract
The utility model discloses a quantum security communication system built based on quantum communication system and classic network communication system. The security communication system comprises a QRD (quantum random number distribution) device, a synchronous random number information base, an information base maintenance module, a data retrieval module, a data compression module, a data preprocessing module and a communication module. The security communication system includes at least two communication terminals which are connected with each other through the quantum communication system and classic channel network. The quantum security communication system based on synchronous random number information base information retrieval provided by the utility model has the advantages of reasonably using informedness possessed by large data volume of random number generated by the quantum communication system; and using the large data volume of synchronous random number information base generated by the quantum communication system which is absolutely secure theoretically to realize security communication of classic information on classic channel, thus reducing redundancy of communication data and gaining higher security theoretically as the random number data are not involved into calculation.
Description
Technical field
The utility model belongs to field of communication security, relates to the safe quantum communication system based on quantum communications network and classical channel network structure.
Background technology
Quantum communications are novel crossed subjects that recent two decades grows up, and are the new research fields that quantum theory and information theory combine.Recently this subject progressively moves towards experiment from theory, and develops to practicability.The message transmission of highly effective and safe receives people's attention day by day.Based on quantum-mechanical basic principle, quantum communications have high efficiency and abampere congruence characteristics.
The practical application of present stage quantum communications generally is and the communicating by letter of classic network realization combining classical information; Rather than transmit whole classical information with quantum communications; Reason is because channel loss and noise, directly transmits whole classical information inefficiency, safety inadequately on the contrary with quantum communications, and the use Quantum Error Correcting Codes might be improved the efficient of direct transmission; But need to generate complicated quantum coding and repeatedly error correction and recodification, its cost is too expensive.Therefore, people utilize the mode of quantum communications to be in the reality: the synchronous random data that utilizes quantum communication system to provide adopts the cipher mode of one-time pad to ensure the safety that classical information is transmitted in classic network as symmetric key.This communication mode application synchrodata that quantum communication system produced has been utilized the randomness of data as random key.
When having the random data of big data quantity, its local its randomness fluctuation of sampling has amount of information.The utility model has utilized the amount of information that sync database had, and proposes a kind of brand-new safe communication system.
To the description of the utility model, we will adopt following term:
Quantum communications (Quantum communication): utilize quantum state to carry out a kind of novel communication modes that information is transmitted.
Quantum communication system: realize the physical system of quantum communications, the basic element of character comprises quantum state generator, quantum passage and quantum measurement mechanism.
Safe quantum communication: by the classical channel safety communication of quantum communication system realization.
Quantum key distribution (QKD) system: with the single photon is information carrier, is quantum channel with optical fiber, sets up cipher key shared at communicating pair, thus the physical system of the distribution of performance sub-key.
Quantum random number distribution (QRD) system: be similar to quantum key distribution (QKD) system, difference is that the QKD system uses quantum state to produce classic key, and QRD utilizes quantum state to produce classical random number information storehouse.
Communication unit:, communication data is carried out the communication unit that dividing processing obtains corresponding to communication data.
Information unit:, cut apart the data retrieval unit that obtains by the random data in the random number information storehouse corresponding to the random number information storehouse.
The maintenance of information table: a series of binary data, its figure place equals the quantity of information unit in the random number information storehouse, i.e. corresponding information unit of each binary digit, whether the expression information unit is used (retrieval or index) mistake.
The communication data retrieval: in the random number information storehouse, search and the identical information unit of communication unit data field data, and the position of writing down this information unit.
The communication data index: according to the data of the acquired information unit, position of information unit, thereby or the data of communication unit data field, be the inverse process of communication data retrieval.
Index communication data: through the communication data after the processing of communication data searching step.
Index compression data: through the index communication data of overcompression.
The utility model content
For remedying the deficiency of prior art, the utility model has made up a kind of safe quantum communication system based on synchronous random number information library information retrieval.For the application of present stage quantum communications, native system has overcome channel loss and noise, and efficient is high, and safe and reliable, cost is low.
The technical scheme that the utility model adopted is following:
A kind of safe quantum communication system based on synchronous random number information library information retrieval, this safe communication system comprises at least two communication terminals, is connected with classical channel network through the quantum communications network simultaneously between the communication terminal;
Each communication terminal of said safe communication system comprises:
Quantum random number distribution QRD equipment, this equipment generates the synchronous random number of big data quantity by means of the quantum communications network at the communication two ends;
The random number information storehouse is connected with QRD equipment synchronously, is used to deposit the synchronous random number of QRD device fabrication, and the amount of information that local its randomness fluctuation of sampling is had by the random data of big data quantity is for communicating pair provides information retrieval and index;
The information bank maintenance module, this module links to each other with synchronous random number information storehouse, for synchronous random number information storehouse setting up the maintenance of information table, according to the operating position updating maintenance table of information bank information unit, according to the Maintenance Table storehouse that Updates Information;
Data retrieval module, this module links to each other with the information bank maintenance module with synchronous random number information storehouse, is responsible for the random number data library information retrieval of transmission information and the random number data library information index of the information of reception;
Data compressing module, this module links to each other with data retrieval module, the decompress(ion) of being responsible for sending the compression of information index data and receiving data;
Data preprocessing module, this module and data retrieval module are responsible for the preliminary treatment of original transmitted information to being connected;
Communication module, this module links to each other with data compressing module, realizes transmission and the reception of communication data on classic network.
Said data preprocessing module connects user's input system.
Said data retrieval module connects user's output system.
Random number data amount byte number in the synchronous random number information storehouse of said communication terminal is 10
8More than.
The quantum random number distribution QRD equipment of said communication terminal connects the quantum communications network.
The communication module of said communication terminal connects the classical communication network, realizes various forms of classical channel communications.
The utility model utilizes the quantum communication network---quantum random number distribution (Quantum Random Distribution; Be called for short QRD) network and the secure communication of classical channel communication mode realization combining classical information, basic with the random number information storehouse that QRD equipment produces as the information of classical data security communication.
The constructed safe quantum communication system of the utility model is as shown in Figure 1; Communicating pair Alice and Bob obtain the basis of synchronous random number information storehouse as both sides' safety communication by means of the QRD equipment of quantum communications network, realize secure communication through classical channel network.
The structure and the communication data handling process of the communication terminal of the safe quantum communication system that the utility model makes up are as shown in Figure 2, and existing handling process to its transceive data elaborates.
Communicating pair is set up synchronous random number information storehouse by QRD equipment through QRD quantum communications network.
Each module of communication terminal is handled communication data according to following steps:
1) communicating pair is confirmed the information unit number according to the data volume in synchronous random number information storehouse, and the information bank maintenance module information bank of communication terminal is set up the maintenance of information table simultaneously.
2) in the data preprocessing module of transmit leg communication terminal the original communication data of user's input are carried out preliminary treatment, it is output as the preprocessed data of forming into some communication units.
3) in information bank, search for the information unit identical in the data retrieval module of transmit leg communication terminal, the index data that obtains is output as the index communication data with the preprocessed data communication unit.
4) at the compression module of transmit leg communication terminal the index communication data is carried out data compression and obtain the index compression data, communication module sends it to receiving terminal through classical channel network.
5) recipient's communication module receives the index compression data of transmit leg through classical channel network; Carry out decompress(ion) by compression module and obtain the index communication data; Data retrieval module obtains corresponding information unit through the index value of index communication data in information bank; The lastest imformation Maintenance Table representes that this information unit is retrieved simultaneously.
6) data retrieval module sends to user's output equipment with the original communication data of the information unit composition that obtains.
7) step 2 is returned in information bank maintenance module inspection lastest imformation storehouse) continue to carry out.
The method of in step 1), confirming the information unit number is following: the unit length that the information of establishing is divided is a n byte, and the information bank data volume that use is the N byte, after then information unit is cut apart, contains N/n information unit in the information bank altogether.
In step 2) in the preprocess method that adopts of data preprocessing module following: communication data is divided into communication unit; The unit length that communication unit is divided equals the length of information bank information unit; Begin from the first address of communication data; The per unit length data is divided into a communication unit, adds the data check position of certain-length simultaneously for each communication unit.
At the communication data of index described in the step 3) be: for each communication unit; Data retrieval module is according to search rule; The identical information unit of data content except that check digit in search and the communication unit from information bank, the index that writes down this information unit is the position number of information unit in information bank, while information bank maintenance module lastest imformation library information Maintenance Table; Represent that this information unit is retrieved; Data retrieval module index of reference value replacement communication unit data field data, the communication data that new communication unit constitutes by original order together is the index communication data.
In step 4), compression module adopts following compression method: the index communication data is converted into 16 system character representations, adopts the following step to carry out encoding compression according to its data characteristics:
(1) begins from the present encoding position; Investigate the uncoded character of smallest match string length MAX_LENGTH; Search the longest matched character string MAXSTR from being no more than the character of having encoded of searching distance L RNGD with present encoding position distance; If len is more than or equal to smallest match string length MIN_LENGTH for the coupling string length, then carries out (2), otherwise carry out (3);
(2) (flag, off len), like the length of the tlv triple length greater than long character for len, then give up tlv triple to the output pointer tlv triple, carry out (3), otherwise the present encoding position is moved len character, continuation (1) backward; Wherein: off is the skew of the relative present encoding of matched character string initial character position, and flag is provided with different values according to the needed actual number of bits of off, with the figure place of sign off;
(3) the character c of output present encoding position moves 1 character with preceding coding site then backward, continues (1).
The renewal process of information bank is following in step 7): the utilization rate of information unit in the computing information storehouse when database maintenance module is upgraded at the maintenance of information table; Like its threshold value greater than setting; Then communicating pair is consulted to carry out the information bank renewal according to the maintenance of information table of same state; Upgrade the information unit that has been retrieved according to the maintenance of information table, upgrade the maintenance of information table of current state simultaneously.
Data retrieval module adopts following search rule to carry out the information unit retrieval: begin search from the information bank first address; At first check the maintenance of information table, only search for binary digit on the corresponding Maintenance Table and be 1 information unit, if find information unit; Its data are identical with data in the communication unit data field; Then write down the index of this information unit, stop search, simultaneously binary digit corresponding on the maintenance of information table is changed to 0; At check field check digit is set, the data field data of representing this communication unit are index data; If search failure; Promptly do not find and the identical information unit of communication unit data field data; The information unit that the index value of then selecting to use in the information bank is minimum carries out XOR with the data in this information unit and the communication unit data field, and operational data is replaced former data field data; Indicate that in the corresponding data bit in the data check district of communication unit these communication unit data are the XOR data, the while is communication unit additional index district for this reason, writes down the index value of employed information unit.
The utility model advantage is following:
1. utilize the synchronous random number information of the big data quantity that quantum communication system the produced storehouse that is perfectly safe in theory to realize the secure communication of classical information on classical channel, the informedness that the big data quantity random number of rationally having utilized quantum communication system to produce is had.
2. compare with the safety communicating method that utilizes random number encryption; The safe quantum communication system based on synchronous random number information library information retrieval that the utility model makes up communicates based on the synchronizing information library searching that is perfectly safe in theory; Random number data is not participated in computing, thereby has higher fail safe in theory.
3. information index data that are based on synchronous random number information storehouse of this communication systems communicate, its data characteristics helps data compression, has reduced the redundancy of communication data.
4. only need to transmit the index value of information bank information unit in the communication process, this is different from traditional safety communicating method, therefore can resist traditional ciphertext only attack methods such as calculus of finite differences.Only if the code breaker has whole big data quantity random number information storehouse, otherwise can not decode.
Description of drawings
Fig. 1 is based on the safe quantum communication system of synchronous random number information library information retrieval;
Fig. 2 communication terminal structure and data processing figure.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
This instance is to implement under the prerequisite in the utility model technical scheme, provide detailed execution mode and concrete method of operation, but the protection range of the utility model is not limited to following instance.
One, QRD equipment and random number information storehouse
The QRD equipment utilization quantum random number distributing network of communication terminal is set up the synchronous random number information of big data quantity storehouse at the communication two ends.Information bank is generally by the 0 and 1 binary data storehouse formed.It is information unit according to following logical partitioning that information bank is created the back:
At first confirm the unit length (also being the unit length that communication data is divided) that information unit is divided according to the length in synchronizing information storehouse.
The method of confirming information unit dividing unit length is following:
Suppose that the unit length that information unit is divided is a n byte, the information bank information unit amount that use is N byte, after then information unit is cut apart, contains N/n information unit in the information bank altogether, the non-existent probability P of a certain information unit
0For:
Information unit is cut apart the back based on the needs of information unit information retrieval, and we hope that any one longly is information unit non-existent probability P in information bank of n byte
0→ 0, if the information unit amount N of information bank can estimate, can confirm the span of n so according to following formula.Consider the communication of data redundancy, we can choose a bigger value in the span of n.Suppose n>=2, then P
0Can be approximately
Suppose that the capacity of information bank is 512M in this example, establishing information unit updated information unit surplus thresholding is 256M, gets N=256M=2
28, can get for people's following formula:
During n=2
During n=3
During n=4
This instance is chosen n=3.Begin from the first address of information bank, per 3 bytes of the information unit data in the information bank are divided into an information unit.
Two, information bank maintenance module
The information bank maintenance module is that information bank is set up a binary message Maintenance Table, and number of bits equals the quantity of information bank information unit, and the corresponding information unit of each binary digit, its initial value are that 1 this information unit of expression does not use.When the information bank information unit is used the binary digit that (be retrieved or by index or be used to XOR) wanted the maintenance of information table response of synchronous lastest imformation maintenance module.
Three, data preprocessing module
Data preprocessing module is carried out preliminary treatment according to following row logic to the original communication data of user's input:
At first, if communication data is a unpacked data, it is compressed to reduce the communication data redundancy, reduce the data volume of communication data, this helps reducing the consumption of information bank.
Secondly, the communication data after the compression is carried out dividing elements.The unit length that communication data is divided is consistent with the unit length that information unit is divided, and also is 3 bytes.The communication data packet first address that transmits from needs begins per 3 bytes and is divided into a communication unit.If a communication data packet is divided into the unit length of 3 bytes of curtailment of last remaining data, then add 0 at afterbody, supply a unit length, constitute a communication unit.
After cutting apart, to add each communication unit the data check position of 5bits in its front, with the byte number of valid data position in the 2nd, the 3 bit representation data cells of data check position.
Four, data retrieval module
In the process of sending data, data retrieval module obtains preprocessed data from pretreatment module, and according to following row logic it is handled:
Search and the identical information unit of communication unit data field data content in information bank.Search rule is: begin search from the information bank first address; At first check the maintenance of information table of maintenance of information module; Only search for binary digit on the corresponding Maintenance Table and be 1 information unit,, then write down the index (position number) of this information unit if exist its data of information unit to equate with data in the communication unit data field; Simultaneously binary digit corresponding on the information unit Maintenance Table is changed to 0, is repeated retrieval to avoid same information unit.Index replacement communication unit data field data with information unit.First binary digit of check field is made as 0, representes that these communication unit data field data are index data.The data structure of retrieving successful communication unit (being referred to as the index communication unit) is as shown in table 1.
Table 1 index communication unit
| B1 | B2 | B3 | Data?Area(Message?Unit?Index) |
Data Area: record communication unit index value, length are 1 to 4 byte;
B1: be 0, expression this element is the index communication unit;
B2:2bit, the effective word joint number (1 to 3 byte) that the expression communication data is divided back communication unit (before the data retrieval);
B3:2bit, the byte number of expression Data Area length, the i.e. length of information unit index value (1 to 4 byte).
If the search failure does not promptly find its data of information unit identical with communication unit data field data, can know that by the calculating of step 1 the search failed probability is about 0.5%.Then carry out XOR, with the former data in operational data replacement data district with the data of first untapped information unit and this communication unit in the information bank.In additional index district, communication unit back, write down the index value (position number) of this information unit simultaneously.Check digit is set representes that these communication unit data field data are the XOR data.
Whether the retrieval of communication unit data field data is no matter successful, all needs the index value of recorded information unit.Consider the capacity of this instance information bank, the recorded information unit index needs at most 4 bytes, thus we in check field with 2 check digit, represent the length of information unit index.The data structure of the communication unit (being referred to as the computing communication unit) of retrieval failure is as shown in table 2.
Table 2 computing communication unit
| B1 | B2 | B3 | Data?Area | Index?Area(Message?Unit?Index) |
Data Area: the data behind the record XOR, length is 3 bytes;
Index Area: the index value of the employed information unit of expression XOR, length is 1 to 4 byte;
B1: be 1, expression this element is the XOR communication unit;
B2:2bit, the effective word joint number (1 to 3 byte) that the expression communication data is divided back communication unit (before the data retrieval);
B3:2bit, the byte number of the data length of expression Index Area, and the length (1 to 4 byte) of information unit index value.
We are referred to as the index communication data treated communication data.
In the process that receives data; Data retrieval module obtains the index communication data from compression module; Carry out the inverse operation of above-mentioned receiving course: index according to the information unit in the index communication data in the synchronizing information storehouse of receiving terminal and find corresponding information unit, thereby obtain communication data according to the check field data.The simultaneously corresponding respective value of information unit on the maintenance of information table of maintenance of information module is changed to 0, representes that this information unit used.
Five, data compressing module
In the process of sending data, compression module obtains the index communication data from data retrieval module, is translated into and is converted into 16 system character representations, adopts the following step to carry out encoding compression according to its data characteristics:
A. we are made as 8 with MAX_LENGTH according to the characteristics of information unit coordinate; Begin from the present encoding position; Investigating length is the uncoded character of MAX_LENGTH; Search the longest matched character string MAXSTR (character of MAXSTR is the character of present encoding position) from being no more than to search the distance character of having encoded of 512 (LRNGD is made as 512) with present encoding position distance; If len is more than or equal to smallest match string length 3 (len＞=3) for the coupling string length, then carries out B, otherwise carry out C.
B. (len), wherein off is the skew of the relative present encoding of matched character string initial character position to the output pointer tlv triple for flag, off, and flag is provided with different values according to the needed actual number of bits of off, with the figure place of sign off; Length like tlv triple is the length of the character of len greater than length, then gives up tlv triple, carries out C, otherwise the present encoding position is moved len character backward, continues A.
The rule that is provided with of flag is:
If off＜2
4, flag is made as 10, accounts for 1 binary digit, distributes the bank bit of 4bits for off;
If 2
4≤off＜2
8, flag is made as 0, accounts for 2 binary digits, distributes the bank bit of 8bits for off;
If off>=2
8, flag is made as 11, and accounting for 2 binary digits is the bank bit that off distributes 9bits;
C. export the character c of present encoding position, then preceding coding site is moved 1 character backward, continue A;
Index communication data compression through overcompression is referred to as the index compression data, sends to communication module.
In receiving the process of data, data compressing module obtains the index compression data from communication module, carries out decompress(ion) according to the inverse operation of compression step, obtains the index communication data.
Six, communication module
Link to each other with classical channel communication gateway, be responsible for the transmitting-receiving of communication data, link to each other with the information bank maintenance module simultaneously and be responsible for transceive data storehouse update signal.
Seven, information bank maintenance module
The information bank maintenance module is that information bank is set up the maintenance of information table, and the operating position of monitoring information base information unit when the utilization rate of information unit surpasses certain threshold value, consults to upgrade synchronous random number information storehouse according to following row logic:
The thresholding that the set information unit upgrades is 50%.The maintenance of information module is calculated according to information bank maintenance of information table, if a side of communicating pair finds the utilization rate of information unit in the information bank greater than 50%, promptly consults to carry out information bank with the other side and upgrades.
Negotiation rules is following: A side carries out when a communication data packet information retrieval is accomplished; As the utilization rate of finding information unit has surpassed setting thresholding 50%; Then back up the maintenance of information table of state this moment; And in the corresponding index compression packet of this packet, add flag information, inform B side's backup information Maintenance Table when this processing data packets finishes.When the B root according to flag information backup information Maintenance Table, can notify A side after the completion, can carry out information unit according to the Maintenance Table of both sides backup this moment and upgrade synchronously.Information unit will upgrade current maintenance of information table (non-backup Maintenance Table) when upgrading simultaneously.
The above; It only is the preferred embodiment that the utility model invention is done; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection range of the utility model technical scheme according to the utility model technical spirit.
Claims (6)
1. the safe quantum communication system based on synchronous random number information library information retrieval is characterized in that this safe communication system comprises at least two communication terminals, is connected with classical channel network through the quantum communications network simultaneously between the communication terminal;
Each communication terminal of said safe communication system comprises:
Quantum random number distribution QRD equipment, this equipment generates the synchronous random number of big data quantity by means of the quantum communications network at the communication two ends;
The random number information storehouse is connected with QRD equipment synchronously, is used to deposit the synchronous random number of QRD device fabrication, and the amount of information that local its randomness fluctuation of sampling is had by the random data of big data quantity is for communicating pair provides information retrieval and index;
The information bank maintenance module, this module links to each other with synchronous random number information storehouse, for synchronous random number information storehouse setting up the maintenance of information table, according to the operating position updating maintenance table of information bank information unit, according to the Maintenance Table storehouse that Updates Information;
Data retrieval module, this module links to each other with the information bank maintenance module with synchronous random number information storehouse, is responsible for the random number data library information retrieval of transmission information and the random number data library information index of the information of reception;
Data compressing module, this module links to each other with data retrieval module, the decompress(ion) of being responsible for sending the compression of information index data and receiving data;
Data preprocessing module, this module and data retrieval module are responsible for the preliminary treatment of original transmitted information to being connected;
Communication module, this module links to each other with data compressing module, realizes transmission and the reception of communication data on classic network.
2. the safe quantum communication system based on synchronous random number information library information retrieval as claimed in claim 1 is characterized in that said data preprocessing module connects user's input system.
3. like the safe quantum communication system of claim 1, it is characterized in that said data retrieval module connects user's output system based on synchronous random number information library information retrieval.
4. like the safe quantum communication system of claim 1, it is characterized in that based on the retrieval of synchronous random number information library information, the random number data amount byte number in the synchronous random number information storehouse of said communication terminal more than.
5. like the safe quantum communication system of claim 1, it is characterized in that the quantum random number distribution QRD equipment of said communication terminal connects the quantum communications network based on synchronous random number information library information retrieval.
6. like claim 1 and the described safe quantum communication of claim 2 system, it is characterized in that the communication module of said communication terminal connects the classical communication network, realizes various forms of classical channel communications.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095461A (en) * | 2013-01-23 | 2013-05-08 | 山东量子科学技术研究院有限公司 | Authentication method for network signaling between quantum safety network equipment |
| CN104468097A (en) * | 2015-01-13 | 2015-03-25 | 中国人民解放军理工大学 | Security data communication achieving method based on quantum key distribution |
| CN110022204A (en) * | 2019-03-20 | 2019-07-16 | 中国电子科技集团公司第三十研究所 | Divide the method for enhancing file security communications security based on content truly randomization |
-
2011
- 2011-07-15 CN CN2011202511018U patent/CN202121594U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095461A (en) * | 2013-01-23 | 2013-05-08 | 山东量子科学技术研究院有限公司 | Authentication method for network signaling between quantum safety network equipment |
| CN103095461B (en) * | 2013-01-23 | 2015-12-09 | 山东量子科学技术研究院有限公司 | The authentication method of network signal between a kind of quantum safety network equipment |
| CN104468097A (en) * | 2015-01-13 | 2015-03-25 | 中国人民解放军理工大学 | Security data communication achieving method based on quantum key distribution |
| CN104468097B (en) * | 2015-01-13 | 2018-01-09 | 中国人民解放军理工大学 | A kind of secure data communication implementation method based on quantum key distribution |
| CN110022204A (en) * | 2019-03-20 | 2019-07-16 | 中国电子科技集团公司第三十研究所 | Divide the method for enhancing file security communications security based on content truly randomization |
| CN110022204B (en) * | 2019-03-20 | 2022-03-18 | 中国电子科技集团公司第三十研究所 | Method for enhancing security of file secret communication based on content true randomization segmentation |
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